Improved Constraints on the Disk Around MWC 349A from the 23-Meter LBTI
arXiv:1706.05010 · doi:10.3847/1538-4357/aa7855
Abstract
We present new spatially resolved observations of MWC 349A from the Large Binocular Telescope Interferometer (LBTI), a 23-meter baseline interferometer made up of two, co-mounted 8-meter telescopes. MWC 349A is a B[e] star with an unknown evolutionary state. Proposed scenarios range from a young stellar object (YSO), to a B[e] supergiant, to a tight binary system. Radio continuum and recombination line observations of this source revealed a sub-arcsecond bipolar outflow surrounding a ~100 mas circumstellar disk. Followup infrared studies detected the disk, and suggested that it may have skew and an inner clearing. Our new infrared interferometric observations, which have more than twice the resolution of previously-published datasets, support the presence of both skew and a compact infrared excess. They rule out inner clearings with radii greater than ~14 mas. We show the improvements in disk parameter constraints provided by LBTI, and discuss the inferred disk parameters in the context of the posited evolutionary states for MWC 349A.
arXiv comment11 pages, 7 figures, accepted for publication in ApJ
References in corpus (34)
- emcee: The MCMC Hammer
- Bayes in the sky: Bayesian inference and model selection in cosmology
- Angular Differential Imaging: a Powerful High-Contrast Imaging Technique
- Accretion Disks around Young Objects. I. The Detailed Vertical Structure
- 2-D Radiative Transfer in Protostellar Envelopes: I. Effects of Geometry on Class I Sources
- LkCa 15: A Young Exoplanet Caught at Formation?
- Accreting Protoplanets in the LkCa 15 Transition Disk
- A spectroscopic survey of Herbig Ae/Be stars with X-Shooter I: Stellar parameters and accretion rates
- HYPERION: An open-source parallelized three-dimensional dust continuum radiative transfer code
- Spatially Resolved Circumstellar Structure of Herbig Ae/Be Stars in the Near-Infrared
- The Disk Around CoKu Tau/4: Circumbinary, not Transitional
- A Likely Close-In Low-Mass Stellar Companion to the Transitional Disk Star HD 142527
- Structure of Herbig AeBe disks at the milliarcsecond scale A statistical survey in the H band using PIONIER-VLTI
- Michelson Interferometry with the Keck I Telescope
- Few Skewed Disks Found in First Closure-Phase Survey of Herbig Ae/Be stars
- High Performance Lyot and PIAA Coronagraphy for Arbitrarily shaped Telescope Apertures
- A dusty torus around the luminous young star LkHa 101
- Kernel-Phase in Fizeau Inteferometry
- Strong near-infrared emission in the sub-AU disk of the Herbig Ae star HD163296: evidence for refractory dust?
- A Disk-Wind Model for the Near-Infrared Excess Emission in Protostars
- Detection of an inner gaseous component in a Herbig Be star accretion disk: Near- and mid-infrared spectro-interferometry and radiative transfer modeling of MWC 147
- Physical characteristics of bright Class I methanol masers
- Strong Near-Infrared Emission Interior to the Dust-Sublimation Radius of Young Stellar Objects MWC275 and AB Aur
- Phase Errors in Diffraction-Limited Imaging: Contrast Limits for Sparse Aperture Masking
- Spatially Resolved Spectroscopy of Sub-AU-Sized Regions of T Tauri and Herbig Ae/Be Disks
- Spatially and Spectrally Resolved Hydrogen Gas within 0.1 AU of T Tauri and Herbig Ae/Be Stars
- The power of Bayesian evidence in astronomy
- Multi-epoch Near-Infrared Interferometry of the Spatially Resolved Disk Around the Be Star Zeta Tau
- Bispectrum speckle interferometry of the B[e] star MWC 349A
- Discovery of a parsec-scale bipolar nebula around MWC 349A
- A non-LTE radiative transfer model to study ionized outflows and disks. The case of MWC349A
- New Spatially Resolved Observations of the T Cha Transition Disk and Constraints on the Previously Claimed Substellar Companion
- Spectropolarimetric Clues to the Structure and Evolutionary Status of MWC 349A
- Confronting Standard Models of Proto--Planetary Disks With New Mid--Infrared Sizes from the Keck Interferometer
Cited by in corpus (5)
- Resolving the clumpy circumstellar environment of the B[e] supergiant LHA 120-S 35
- Data Reduction and Image Reconstruction Techniques for Non-Redundant Masking
- Herschel Planetary Nebula Survey (HerPlaNS): Hydrogen Recombination Laser Lines in Mz 3
- New Spatially Resolved Imaging of the SR 21 Transition Disk and Constraints on the Small-Grain Disk Geometry
- ELT Imaging of MWC 297 from the 23-m LBTI: Complex Disk Structure and a Companion Candidate